GP Unique ID // Gravity Perks // Creates Date-specific Unique Sequences

gp-unique-id-date-specific-unique-ids.php

<?php
/**
 * GP Unique ID // Gravity Perks // Creates Date-specific Unique Sequences
 * http://gravitywiz.com/
 *
 * Update the "123" to your form ID; update the "9" to your Unique ID field ID.
 */
add_filter( 'gpui_unique_id_attributes_123_9', function( $atts, $form_id, $field_id ) {

	$date_slug = date( 'mdY' );
	$atts['form_id'] = (int) $date_slug;
	$atts['prefix'] = $date_slug;
	$atts['length'] = 4;

	return $atts;
}, 10, 3 );

Hello,

I had added this code to my theme's functions.php file. Now how can I add date to my unique id of GF

Thanks in advance.